I know im a hardcore believer of .jp but i worry i can be wrong, so here is what im doing...lately I have been trying to check many websites to see which ones are using IDNs and at the same time to see which companies registered idn.com and idn.jp , so we can venture to guess a little which ones we will be seeing in the years to come.
What i see is again many companies took idn.jp , leaving the .com free to be taken, why? i dont know but i already check more than 100 big companies doing this. My guess again in a few years we will be seeing these famous companies using IDN.jp , because they got more money to invest on publicity of their IDN.jp url ; or i dont know if they were short-sighted and they will now have to buy the .com from the guys who took them, who knows...
Im not gonna give now many examples because many .com of famous japanese companies are taken by several members. But im gonna use at least these ones, i double checked the whois to verify wasnt taken by a member. If u own the .com of these companies, im sorry, i didnt mean anything. but really many guys took so many japanese companies, amazing...
ソニー.jp
sony.co.jp
Registered on 2001, .com was taken on 2005 by X person
http://www.味の素.jp
http://www.ajinomoto.co.jp
Registered on 2001, was .com taken on 2005 by X person
松下電器産業.jp and パナソニック.jp
panasonic.co.jp
Registered on 2001; 松下電器産業.com was taken on 2006 by X person and パナソニック.com taken on 2005 by X person
アサヒビール.jp
asahibeer.co.jp
Registered on 2001, .com was taken on 2005 by X person
富士通.jp
fujitsu.jp
Registered on 2001, .com taken on 2004 by X person
By the way, i find these famous companies are already using their IDN.jp, not just forwarding to their .co.jp This is good news.
http://明治製菓.jp very famous candy company using IDN.jp
http://www.meiji.co.jp/
http://日経.jp newspaper
http://www.nikkei.co.jp/
http://フジテレビ.jp tv channel
http://www.fujitv.co.jp/index.html